Heat oven to 425�. Put butter and oil in 13x9 inch pan. Put in oven to melt and warm pan. Meanwhilie, in saucepan, melt 3 T. margarine. Remove from heat. Meanwhile beat eggs in medium bowl with whisk. Add flour in 4 additions. Stir in 2-3 T. of melted margarine from saucepan and salt. Pour batter into hot baking pan. Bake for 10 minutes. Reduce heat to 350� and bake for 5 minutes longer until fluffy and brown around edges and firm. Meanwhile, cook onion in 1 T. remaing margarine in saucepan. Add beef, gravy and mixed vegetables until vegetabes are tender, 10 minutes. Spoon meat mixture over baked batter and serve. MC formatting by bobbi744@acd.net ICQ#2099532